Protocol Buffers - Google's data interchange format

LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

An open-source C++ library developed and used at Facebook.

The MongoDB Database

Emscripten: An LLVM-to-WebAssembly Compiler

Mobile Shell

Cap'n Proto serialization/RPC system - core tools and C++ library

ZeroMQ core engine in C++, implements ZMTP/3.1

Linux system exploration and troubleshooting tool with first class support for containers

PowerDNS Authoritative, PowerDNS Recursor, dnsdist

Lightweight in-process concurrent programming

Advanced library for randomization, hashing and statistical analysis (devoted to chaos machines). 🔬

Pyjion - A JIT for Python based upon CoreCLR